Do you have a medical background or scientific references to prove that mental illnesses are just "a state of mind" with no effects in the brain?

I guess this question was bound to come up. I’m not sure how it’s intended or from what perspective you’re asking this.  The short answer is, no. I don’t have a medical background, but all the information I share on the subject is supported by numerous research efforts, holistic healing methods that challenge mainstream medicine, [...]